at one's sixties是什么含义?是不是在某人６０多岁 sixty为什么是sixties?

Having a healthy lifestyle is an investment in yourself and it is, let's face it, the most important one you can make, ignore this aspect at your own risk.
拥有健康的生活方式是对自己的投资,你所能做的最重要的事情就是,不再忽略自己的健康,并对此负责.
希望对你有帮助

是的,很多.下面就是：
黔驴技穷 [qián lǘ jì qióng]
be at [come to] one's wit's end;
be at the end of one's rope;
show feet of clay;
have exhausted one's tricks;
have exhausted one's bag of tricks;
have no other tricks left to play;
on one's last legs;
The proverbial donkey in ancient Guizhou has exhausted its tricks.;
with nothing much left up in the sleeves

This business is at my own risk.

可以从句子结构上看看
Mike was at his wits' end 到这里这个句子可以说结束了,
那么后面的what to do 就是作为宾语补足语的存在的

at the age of 在…岁时
She was barely walking at the age of four.
她四岁时才勉强会走.
at one's age
在某人的年龄
Cycling to work every day at her age in no small achievement.
她像这样年纪的人还每天骑自行车上班,真是了不起

at the same time,同时
at one time 曾经

As soon as loan paid,the goods will be delivered to you at your convenience.They can have full access to the company files.Originally,This is a bedroom,but we change it to study.

attitude
[5Atitju:d]
n.
姿势,态度,看法,意见
attempt
[E5tempt]
n.
努力,尝试,企图
vt.
尝试,企图
某人自己的